1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed4c7e165360b8a6772f615723a3a13ebfa468ec265770d7e6d52e419693ad5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f08b42fa-c191-404b-835a-e694168f5586.json and https://artists.proofprofile.net/proofs/artist/f08b42fa-c191-404b-835a-e694168f5586.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff86f09870cc858c519b2563770d494dcfb9e30fe7e11650b45daa67676722d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU7591599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedad9a9faf482fbdb002e15d0e7d433006fad8bf6a469403e73b0759ba6bf914. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU8676770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829a81e1e01a9d752754c57f9c36f3b249a50a25e4fab5a5ea34d88e6f64a858. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU8676835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a72364ec9f6784d8957a30d9b993940dc75e6555e13cd761336742bcf1445b7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHN2081739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1a45439a21c82e4718d12249636a4ea62b618e7b025342ddbdb018426c369. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2097929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13f9bdec65c18665f07fced564fb48c2622d0fe8d4e4346bef6ea3363a0fd8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS672193536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73db502b67b1019dc6bddeed068700150ca23d01beded6717ffa26989a397d3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS652108155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb794917d8c68c383b70e73b294c8a0cade82c10a8401a285a26b8bd142ecf2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2267089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746430cb3c737e0134d183689a224f06c173c694356dd5d50380288b8f0cb3a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZJRB2275501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625d0c05802b221ff6321ab1be75474c08f8fe4bd0874816608e3776e819b842. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTH92349407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6efeb66c3b2a7a1b6bfe2e5948dab956ee45c0df0d06ff7f553650b9b40d9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTH92349408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8d29eb9ed99eb74a8ae23fe77cc5ed20eba32c81dd92a116489ba9b4ba9ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTH92349411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814e654792b09eb84936e73e85f985e89574660f3ef4978c6c3ed3777ce7d14. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52402690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40db0507e9fc7ccc107c5f54c408fce5ad6a12256326f1eead79279b6660cbaa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52402689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a98ce2b652699274a1da5cd8d083e5aa4a2dba0ea5d1f9d8e9c1a189fd242e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52402688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1e12d2a9e0dbe61f2724da35c75c251cd04d2a61e27af1f55cc9084b0fc341. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2125666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495febe0e318e0ff047fd2115f71ac252adc7655261141203b9f2774b7b35c27. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2099170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3528310b9a8915a50cbe65894d782c3f6807dc130219c43708deff3990bbf51d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2320886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a52cdee3770644a695aeb7c1e49e0fa9aa33c9df41cae3f8c76851d9d3e2c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9799f6e466b9417f8a964f10a68484a0d42d31ab666c3694a35f7570c38b2002. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUB521220438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd358508b0d2a257663348b8f5c6c0365032ec477aea489d8d7ea9f2d165094ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42340494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a1d887d5bcb18e8aba6c4e4a415644bed19c08c9103b8c99abe86705d707a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2224036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590b63debb8177face5fb0731035f09941902ba6b1944c36ae087a546ef14ec4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHP2014443.